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Originally Posted by e_dawg
Cheap pots often have volume tracking problems at low volumes. You could send it back and insist that he try multiple pots until he finds one that doesn't have noticeable tracking problems...
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| Looking at the datasheet of the LM4881, it would be wise not to use the amp plugged into the low quality unregulated adapter (as Gary himself called it). These things are insane ripple generators, and with the low PSRR of the LM4881, you would surely hear it. |
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Now, for an idea about modding: The LM4881's performance suffers a bit due to the low supply voltage from the 2 AA's (2.4v, which is below even the 2.7v minimum recommended supply voltage on the datasheet), so barring Plainview coming out with 1.5v NiMH AA's you might want to think about getting another pair of AA's in there  |
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| Or, you could get a 5v linear regulated power like the Elpac WM050-1950-760 or possibly the WM1005-760 or WP1205-760, which would cost you $25-40 depending on availability and order size, which might make you question whether you should just put it towards a better amp. |
